91821611000 has 64 divisors (see below), whose sum is σ = 245557241280. Its totient is φ = 31481692800.

The previous prime is 91821610949. The next prime is 91821611023. The reversal of 91821611000 is 11612819.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6551687 + ... + 6565686.

It is an arithmetic number, because the mean of its divisors is an integer number (3836831895).

Almost surely, 2^91821611000 is an apocalyptic number.

It is an amenable number.

91821611000 is an abundant number, since it is smaller than the sum of its proper divisors (153735630280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91821611000 is a wasteful number, since it uses less digits than its factorization.

91821611000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13117401 (or 13117387 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 29.

The spelling of 91821611000 in words is "ninety-one billion, eight hundred twenty-one million, six hundred eleven thousand".